Nail



Oct. 26 1926.

G. C. FEDDERMAN NAIL Filed Feb. 4, 1926 Y 5 in the wood for reuse.

Patented Oct. 26, 1926.

UNITED STATES'PATENT OFFICE;

GEORGE C. FEDDERMAN, 013 DETROIT, MICHIGAN, ASSIGNOR T AUTO LOADDTG DE- VICE MANUFACTURING COMPANY, OF DETROIT, MICHIGAN, A CQRPORATION OF MICHIGAN.

, NAIL.

Application filed February 4, 1926. Serial No. 85,942.

My invention is a nail adapted to be driven to a limited extent so that its head portion will be left protrudingslightly so that the nail readily can be drawn from its position Such a nail is desirable for use in connection with making temorarily forms for concrete building when it is of advantage to use again the material making up the forms, it being possible to 1 withdraw the nails without damage to the material, or such nails are useful in connection with returnable shipping material where it is desirable to knock down the forms or structures so that the material composing 1 them can be used over again.

In the accompanying drawin igure 1 shows the nail in side view and Fig. 2 shows the nail in end view.

In these drawings 1 indicates the stem or 90 body portion of the nail and 2 indicates an integral cylindrical enlargement forming a shoulder at 3 extending around the main or body part.

This enlargement merges into a flaring 2! terminal formation 4 which forms the head proper, this being of larger diameter than the cylindrical shoulder portion. This flared head portionfi is in the form ofan inverted frustum of a cone, and is adapted to receive 80 beneath it the claw of the extracting implement.

In driving the nail it will enter the wood or other material until the annular shoulder 3 rests thereon. This limits the degree to 36 which the nail enters the material so that the inverted frusto-conical formation will be left standing out from the surface of the material together with the cylindrical enlargement forming the stop. This cylindri- 40 cal stop portion is sufficiently long to locate the inverted frustum of a cone at proper distance from the surface of the wood or other drawal of the nail,'but on the contrary the frusto-conical formation acts as a guide for directing the claw into place.

This nail is economical in manufacture which involves only a one blow operation, a minimum amount of stock is required.

There is ample stock for receiving the claw, yet the head does not protrude so far as to be in the way or otter any substantial obstruction. There is no excessive amount of stock in the head and the nail can be coated economically. With the conically formed head herein described there is no liability of'crystallization in manufacture as there is in the ordinary wire nail with a thin sharply flanged head.

Owing to the frusto-conical formation joined to the enlarged cylindrical. stop portion, the head is strong and will stand the strain of driving or extracting without danger of rupture.

I claim:

A wire upset nail having a stem or'body with a head integral therewith, said head having a shouldered portion of larger diameter than the stem, presenting at its juncture with the stem a fiat annular surface or shoulder, and an inverted frusto-conical por tion adjoining the shouldered portion, the diameter of the shouldered portion being no greater than the smaller diameter of the conical portion.

In testimony whereof I aflix my signature.

GEORGE C. FEDDERMAN. 

